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| Format: | Preprint |
| Publié: |
2025
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| Accès en ligne: | https://arxiv.org/abs/2508.14168 |
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| _version_ | 1866916909307396096 |
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| author | Capecchiacci, Sara Liodakis, Ioannis Middei, Riccardo Kim, Dawoon E. Di Gesu, Laura Agudo, Ivan Agis-Gonzalez, Beatriz Arbet-Engels, Axel Blinov, Dmitry Chen, Chien-Ting Ehlert, Steven R. Gau, Ephraim Heckmann, Lea Hu, Kun Jorstad, Svetlana G. Kaaret, Philip Kouch, Pouya M. Krawczynski, Henric Lindfors, Elina Marin, Frederic Marscher, Alan P. Myserlis, Ioannis O'Dell, Stephen L. Pacciani, Luigi Paneque, David Perri, Matteo Puccetti, Simonetta Saade, M. Lynne Tavecchio, Fabrizio Tennant, Allyn F. Traianou, Efthalia Weisskopf, Martin C. Wu, Kinwah Aceituno, Francisco Jose Bonnoli, Giacomo Casanova, Victor Emery, Gabriel Escudero, Juan Morcuende, Daniel Otero-Santos, Jorge Sota, Alfredo Piirola, Vilppu Borman, George A. Kopatskaya, Evgenia N. Larionova, Elena G. Morozova, Daria A. Shishkina, Ekaterina V. Savchenko, Sergey S. Vasilyev, Andrey A. Grishina, Tatiana S. Troitskiy, Ivan S. Zhovtan, Alexey V. McCall, Callum Jermak, Helen E. Steele, Iain A. Bachev, Rumen Strigachev, Anton Imazawa, Ryo Sasada, Mahito Fukazawa, Yasushi Kawabata, Koji S. Uemura, Makoto Mizuno, Tsunefumi Nakaoka, Tatsuya Tochihara, Sumie Akai, Takahiro Akitaya, Hiroshi Berdyugin, Andrei V. Kagitani, Masato Kravtsov, Vadim Poutanen, Juri Sakanoi, Takeshi Alvarez-Ortega, Diego Casadio, Carolina Kang, Sincheol Lee, Sang-Sung Kim, Sanghyun Cheong, Whee Yeon Jeong, Hyeon-Woo Song, Chanwoo Li, Shan Nam, Myeong-Seok Gurwell, Mark Keating, Garrett Rao, Ramprasad Angelakis, Emmanouil Kraus, Alexander Benke, Petra Debbrecht, Lena Eich, Julia Eppel, Florian Gokus, Andrea Hammerich, Steven Hessdorfer, Jonas Kadler, Matthias Kirchner, Dana Paraschos, Georgios Filippos Rosch, Florian Schulga, Wladislaw |
| author_facet | Capecchiacci, Sara Liodakis, Ioannis Middei, Riccardo Kim, Dawoon E. Di Gesu, Laura Agudo, Ivan Agis-Gonzalez, Beatriz Arbet-Engels, Axel Blinov, Dmitry Chen, Chien-Ting Ehlert, Steven R. Gau, Ephraim Heckmann, Lea Hu, Kun Jorstad, Svetlana G. Kaaret, Philip Kouch, Pouya M. Krawczynski, Henric Lindfors, Elina Marin, Frederic Marscher, Alan P. Myserlis, Ioannis O'Dell, Stephen L. Pacciani, Luigi Paneque, David Perri, Matteo Puccetti, Simonetta Saade, M. Lynne Tavecchio, Fabrizio Tennant, Allyn F. Traianou, Efthalia Weisskopf, Martin C. Wu, Kinwah Aceituno, Francisco Jose Bonnoli, Giacomo Casanova, Victor Emery, Gabriel Escudero, Juan Morcuende, Daniel Otero-Santos, Jorge Sota, Alfredo Piirola, Vilppu Borman, George A. Kopatskaya, Evgenia N. Larionova, Elena G. Morozova, Daria A. Shishkina, Ekaterina V. Savchenko, Sergey S. Vasilyev, Andrey A. Grishina, Tatiana S. Troitskiy, Ivan S. Zhovtan, Alexey V. McCall, Callum Jermak, Helen E. Steele, Iain A. Bachev, Rumen Strigachev, Anton Imazawa, Ryo Sasada, Mahito Fukazawa, Yasushi Kawabata, Koji S. Uemura, Makoto Mizuno, Tsunefumi Nakaoka, Tatsuya Tochihara, Sumie Akai, Takahiro Akitaya, Hiroshi Berdyugin, Andrei V. Kagitani, Masato Kravtsov, Vadim Poutanen, Juri Sakanoi, Takeshi Alvarez-Ortega, Diego Casadio, Carolina Kang, Sincheol Lee, Sang-Sung Kim, Sanghyun Cheong, Whee Yeon Jeong, Hyeon-Woo Song, Chanwoo Li, Shan Nam, Myeong-Seok Gurwell, Mark Keating, Garrett Rao, Ramprasad Angelakis, Emmanouil Kraus, Alexander Benke, Petra Debbrecht, Lena Eich, Julia Eppel, Florian Gokus, Andrea Hammerich, Steven Hessdorfer, Jonas Kadler, Matthias Kirchner, Dana Paraschos, Georgios Filippos Rosch, Florian Schulga, Wladislaw |
| contents | Polarimetric properties of blazars allow us to put constraints on the acceleration mechanisms that fuel their powerful jets. By studying the multiwavelength polarimetric behaviour of high synchrotron peaked (HSP) and low synchrotron peaked (LSP) blazars, we aim to explore differences in their emission mechanisms and magnetic field structure in the acceleration region. In this study, we take advantage of several X-ray polarisation observations of HSP by the IXPE, including four new observations of Mrk 501, and optical polarisation observations of LSP from RoboPol and many others. We find that the polarisation degree (PD) distribution of HSP in X-rays is systematically higher than in optical and mm-radio wavelengths, as reported in previous IXPE publications. The distribution of the X-ray electric vector position angles (PA) is centered around the jet axis with most of the observations consistent with zero difference within uncertainties. In fact, the distribution of the offset of the PA from the jet axis is consistent between the LSP and HSP populations (with PA measured in optical for the first, X-ray for the latter), suggesting a common magnetic field structure close to the acceleration region, in strong support of the emerging energy stratified picture of particle acceleration followed by energy loss in blazar jets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_14168 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Unveiling blazar synchrotron emission: a multiwavelength polarimetric study of HSP and LSP populations Capecchiacci, Sara Liodakis, Ioannis Middei, Riccardo Kim, Dawoon E. Di Gesu, Laura Agudo, Ivan Agis-Gonzalez, Beatriz Arbet-Engels, Axel Blinov, Dmitry Chen, Chien-Ting Ehlert, Steven R. Gau, Ephraim Heckmann, Lea Hu, Kun Jorstad, Svetlana G. Kaaret, Philip Kouch, Pouya M. Krawczynski, Henric Lindfors, Elina Marin, Frederic Marscher, Alan P. Myserlis, Ioannis O'Dell, Stephen L. Pacciani, Luigi Paneque, David Perri, Matteo Puccetti, Simonetta Saade, M. Lynne Tavecchio, Fabrizio Tennant, Allyn F. Traianou, Efthalia Weisskopf, Martin C. Wu, Kinwah Aceituno, Francisco Jose Bonnoli, Giacomo Casanova, Victor Emery, Gabriel Escudero, Juan Morcuende, Daniel Otero-Santos, Jorge Sota, Alfredo Piirola, Vilppu Borman, George A. Kopatskaya, Evgenia N. Larionova, Elena G. Morozova, Daria A. Shishkina, Ekaterina V. Savchenko, Sergey S. Vasilyev, Andrey A. Grishina, Tatiana S. Troitskiy, Ivan S. Zhovtan, Alexey V. McCall, Callum Jermak, Helen E. Steele, Iain A. Bachev, Rumen Strigachev, Anton Imazawa, Ryo Sasada, Mahito Fukazawa, Yasushi Kawabata, Koji S. Uemura, Makoto Mizuno, Tsunefumi Nakaoka, Tatsuya Tochihara, Sumie Akai, Takahiro Akitaya, Hiroshi Berdyugin, Andrei V. Kagitani, Masato Kravtsov, Vadim Poutanen, Juri Sakanoi, Takeshi Alvarez-Ortega, Diego Casadio, Carolina Kang, Sincheol Lee, Sang-Sung Kim, Sanghyun Cheong, Whee Yeon Jeong, Hyeon-Woo Song, Chanwoo Li, Shan Nam, Myeong-Seok Gurwell, Mark Keating, Garrett Rao, Ramprasad Angelakis, Emmanouil Kraus, Alexander Benke, Petra Debbrecht, Lena Eich, Julia Eppel, Florian Gokus, Andrea Hammerich, Steven Hessdorfer, Jonas Kadler, Matthias Kirchner, Dana Paraschos, Georgios Filippos Rosch, Florian Schulga, Wladislaw High Energy Astrophysical Phenomena Polarimetric properties of blazars allow us to put constraints on the acceleration mechanisms that fuel their powerful jets. By studying the multiwavelength polarimetric behaviour of high synchrotron peaked (HSP) and low synchrotron peaked (LSP) blazars, we aim to explore differences in their emission mechanisms and magnetic field structure in the acceleration region. In this study, we take advantage of several X-ray polarisation observations of HSP by the IXPE, including four new observations of Mrk 501, and optical polarisation observations of LSP from RoboPol and many others. We find that the polarisation degree (PD) distribution of HSP in X-rays is systematically higher than in optical and mm-radio wavelengths, as reported in previous IXPE publications. The distribution of the X-ray electric vector position angles (PA) is centered around the jet axis with most of the observations consistent with zero difference within uncertainties. In fact, the distribution of the offset of the PA from the jet axis is consistent between the LSP and HSP populations (with PA measured in optical for the first, X-ray for the latter), suggesting a common magnetic field structure close to the acceleration region, in strong support of the emerging energy stratified picture of particle acceleration followed by energy loss in blazar jets. |
| title | Unveiling blazar synchrotron emission: a multiwavelength polarimetric study of HSP and LSP populations |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2508.14168 |